An apparatus and a method for transmitting traffic-related data in road traffic include transmitting the traffic-related data in the form of dynamically generated QR codes from a transmission or display device to a mobile unit hosted by at least one vehicle, and wherein the mobile unit hosted by the vehicle is designed likewise to transmit dynamically generated QR codes. The mobile unit may include an organic light emitting diode (OLED) display, or a smartphone, tablet, or similar device positioned for visibility through a vehicle window.